--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/imageio/plugins/png/PNGImageReaderSpi.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2000-2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.imageio.plugins.png;
+
+import java.io.IOException;
+import java.util.Locale;
+import java.util.Iterator;
+import javax.imageio.ImageReader;
+import javax.imageio.spi.ImageReaderSpi;
+import javax.imageio.metadata.IIOMetadataFormat;
+import javax.imageio.metadata.IIOMetadataFormatImpl;
+import javax.imageio.stream.ImageInputStream;
+
+public class PNGImageReaderSpi extends ImageReaderSpi {
+
+    private static final String vendorName = "Sun Microsystems, Inc.";
+
+    private static final String version = "1.0";
+
+    private static final String[] names = { "png", "PNG" };
+
+    private static final String[] suffixes = { "png" };
+
+    private static final String[] MIMETypes = { "image/png", "image/x-png" };
+
+    private static final String readerClassName =
+        "com.sun.imageio.plugins.png.PNGImageReader";
+
+    private static final String[] writerSpiNames = {
+        "com.sun.imageio.plugins.png.PNGImageWriterSpi"
+    };
+
+    public PNGImageReaderSpi() {
+        super(vendorName,
+              version,
+              names,
+              suffixes,
+              MIMETypes,
+              readerClassName,
+              STANDARD_INPUT_TYPE,
+              writerSpiNames,
+              false,
+              null, null,
+              null, null,
+              true,
+              PNGMetadata.nativeMetadataFormatName,
+              "com.sun.imageio.plugins.png.PNGMetadataFormat",
+              null, null
+              );
+    }
+
+    public String getDescription(Locale locale) {
+        return "Standard PNG image reader";
+    }
+
+    public boolean canDecodeInput(Object input) throws IOException {
+        if (!(input instanceof ImageInputStream)) {
+            return false;
+        }
+
+        ImageInputStream stream = (ImageInputStream)input;
+        byte[] b = new byte[8];
+        stream.mark();
+        stream.readFully(b);
+        stream.reset();
+
+        return (b[0] == (byte)137 &&
+                b[1] == (byte)80 &&
+                b[2] == (byte)78 &&
+                b[3] == (byte)71 &&
+                b[4] == (byte)13 &&
+                b[5] == (byte)10 &&
+                b[6] == (byte)26 &&
+                b[7] == (byte)10);
+    }
+
+    public ImageReader createReaderInstance(Object extension) {
+        return new PNGImageReader(this);
+    }
+}